Overview
The ZF 4656.183.252 is a precision-engineered OEM genuine component specifically designed for the WG 160 Series transmission. This part functions as a critical internal guide and sealing element, ensuring proper oil flow and pressure regulation within the transmission’s hydraulic circuit. Positioned within the valve body assembly, the SKU 4656.183.252 directly influences shift timing and clutch engagement. When this component degrades, it compromises the entire hydraulic balance, leading to performance issues. For complete transmission integrity, this part works in concert with the 4656101056: TRANSMISSION HOUSING and the 4656201075: HOUS.FRONT SECT to maintain structural alignment.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn internal sealing surfaces cause hydraulic pressure loss, resulting in “ZF WG160 transmission shifting hard” or “transmission slipping when cold.”
- Intermittent loss of drive: As the part fatigues, you may experience “transmission losing power under load” or “WG160 gear drop-out” during highway operation.
- Contaminated transmission fluid: Degraded material can shed particles, leading to “black or burnt-smelling ATF fluid” and clogged filter screens.
- Audible whining or grinding: Improper clearance from a worn 4656.183.252 produces a “transmission whine in neutral” that intensifies with RPM.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4656.183.252 |
| Material | Hardened alloy steel with nitrile coating |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 142 mm |
| Width | 48 mm |
| Height | 32 mm |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4656.183.252 (Genuine) |
Compatibility
This genuine ZF part is primarily engineered for the WG 160 Series transmission family. It is also compatible with the following ZF models that share the same hydraulic valve body architecture: WG 180, WG 200, and WG 150 series transmissions. Always verify the part number against your transmission’s serial plate. When replacing this component, inspect the 4656201077: HOUSING REAR PART and the 4656298049: HOUSING REAR SECTION for wear, as they share the same sealing interface.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4656201077 | HOUSING REAR PART | Rear section supporting output shaft |
| 4656298049 | HOUSING REAR SECTION | End cover for rear bearing support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | M10x25 fastener for housing bolts |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return line |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M8x20 fastener for valve body |
Frequently Asked Questions
Q: How do I know if the 4656.183.252 needs replacement?
A: If you experience erratic shifting or fluid contamination in your WG160, inspect this part for scoring or deformation. A pressure test showing below-spec values in the clutch circuit often confirms wear.
Q: Can I install this part without removing the transmission?
A: No. Access requires removal of the transmission oil pan and valve body. We recommend replacing the 4656301016: SCREEN SHEET simultaneously to prevent debris from circulating.
Q: Is this part interchangeable with aftermarket versions?
A: Only OEM genuine ZF parts guarantee the exact metallurgy and dimensional tolerances. Aftermarket copies often fail prematurely due to inferior nitrile coating.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
